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Early warning for close approaches of two house-sized asteroids

Emily Lakdawalla • September 08, 2010

Most of you have probably heard by now of two small asteroids, both in the neighborhood of 10 meters in diameter, recently discovered on trajectories that pass unusually close to Earth.

The Potential to Destroy Civilization? Now on YouTube

Charlene Anderson • August 29, 2010

Visualization can help the brain comprehend what words and numbers can struggle to covey. There's a YouTube video posted by "szyzyg" making the rounds right now that drives that point home.

Report from the Exploration of Near-Earth Objects Objectives Workshop - Day 2

Bruce Betts • August 11, 2010

It's day 2 at NASA's Exploration of Near Earth Objects (NEO) Objectives workshop (ExploreNOW).

Report from the Exploration of Near-Earth Objects Objectives Workshop

Bruce Betts • August 10, 2010

This week, Jennifer Vaughn and I are representing the Planetary Society at NASA's Exploration of Near-Earth Objects (NEO) Objectives Workshop, or ExploreNOW.

How radio telescopes get "images" of asteroids

Emily Lakdawalla • April 29, 2010

Every time I post a radio telescope image of a near-Earth asteroid, I get at least one reader question asking me to explain how radio telescopes take photos, so I'm hereby writing a post explaining the basics of how delay-Doppler imaging works.

Arecibo saves us from another potentially hazardous asteroid

Emily Lakdawalla • April 29, 2010

That's a bit of an overdramatic title, but it's true that the most efficient way for us to reduce the risk we face from asteroids that have a very small chance of hitting Earth in the future is to determine their orbits more precisely.

Updates on Shoemaker NEO Grant Recipients

Bruce Betts • March 18, 2010

Our past Shoemaker NEO grant recipients have once again shown themselves to be a hardworking and enterprising group.

Propose for a Shoemaker Near Earth Object Grant

Emily Lakdawalla • March 17, 2010

Are you a serious amateur astronomer who enjoys the challenge of following up on the discoveries of faint near-Earth objects?

Inside the U.N.'s Near Earth Object Working Group

Bruce Betts • February 15, 2010

This week Bruce Betts is attending a U.N. meeting in Austria, in particular the parts focused on international considerations of the near-Earth object threat.

Planetary Society Researcher Max Rocca Discovers Largest Impact Crater in South America

Amir Alexander • February 13, 2010

It was January of 2004 when the elegant curve of the Vichada first caught the attention of geologist Max Rocca of Buenos Aires. Could the course of the river have been shaped by the circular outlines of an impact crater? Rocca decided to find out.

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